Pipe-wrench.



T. J. NICHOLSON.

PIPE WRENCH.

urmowron mum arm. 21, 1910.

Patented Dec. 6, 1910.

WITNESSES 5W /w fi ATTORNEYS I UNITE STATS n are PIPE-WRENCH.

Specification of Letters Patent.

Patented Dec. 6, 1910.

Application filed. September 27, 1910. Serial No. 584,026.

a circular head adapted to detachably re-- ceive jaws havlng bearingsurfaces for safely gripping polished pipe and springs secured to thehandles and adapted to engage the jaws to hold the same in operativeposition in the said head.

Reference is to be had to the accompanying drawings constituting a partof this specification in which similar characters of reference denotecorresponding parts in all the views, and in which Figure l is a sideelevation showing my wrench gripping a pipe; Fig. 2 is a plan view ofthe same; Fig. 3 is a sectional view taken on the line 33 in Fig. 1 anddisclosing the means for securing the jaws to the head; and Fig. 1 is aside elevation of a pair of jaws for attachment to the head of mydevice.

Referring more particularly to the views, I employ a pair of handles 10,pivoted at 11 by a pin 11*, and terminating in a circular head 12 formedby integral portions 13 each formed on a handle 10. Secured to the head12 are oppositely disposed pins 14 and secured to the handles 10 arelongitudinally extending springs 15 adapted to project a short distancebeyond one end of the head 12. Jaws 16 provided with bearing surfaces orpads 17 are provided to be detachably secured to the head 12 by means ofthe pins 14 and are substantially held in place by the ends of thesprings 15 engaging the jaws 16 as will be easily seen in Fig. 3.

In use, the device described is applied to pipes by slipping the wrenchover the pipe so that a portion thereof is incased in the head andgripped by the gripping pads 17.

These pads are preferably made of rubber so that when a polished pipe 18is gripped the surface thereof will not be marred, while at the sametime a substantially tight hold is secured on the pipe.

Various sized jaws may be used with the wrench described and in Fig. 4:I have disclosed apair of jaws 19 provided with eccentrically disposedpads 20, thus making it possible to use my wrench on various sizedpipes.

In order to enable my wrench to be used in places where there is verylittle room, I have employed a removable pin 11 so that the handles 10can be disengaged, fitted around a pipe as mentioned, and quicklyreconnected.

Inasmuch as the greatest amount of wear, in the use of my wrench, is onthe rubber surfaces or pads 17 the same can be easily removed when wornout and be quickly replaced by new pads.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A pipe wrench comprising a pair of pivotallyconnected handles terminating in a circular head, pins secured to thehead, jaws for detachable engagement with the head and adapted to engagethe said pins, and springs secured to the handles and engaging the jawsto removably hold the same in the head.

2. A pipe wrench comprising a pair of pivotally connected handlesterminating in a circular head, jaws for detachable engagement with thesaid head and provided with soft bearing surfaces whereby a polishedpipe can be gripped without marring the same, oppositely disposed pinssecured to the head and adapted to be engaged by the jaws, andlongitudinally extending springs secured to the handles and engaging thejaws to removably hold the same in the head.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS JAMES NICHOLSON.

Witnesses:

T. J. RIGNEY, CLARE OORRIGAN.

